Castlewood

County:: Hamlin County
County Seat:: No
Area (mi²):: 1.15
State:: South Dakota

Castlewood is a city located in Hamlin County, South Dakota. Castlewood has a 2025 population of 712. Castlewood is currently growing at a rate of 0.42% annually and its population has increased by 2.15% since the most recent census, which recorded a population of 697 in 2020.

The average household income in Castlewood is $90,463 with a poverty rate of 3.04%. The median age in Castlewood is 36.9 years: 36.2 years for males, and 39.5 years for females.

Demographics

The racial composition of Castlewood includes 88.62% White, and smaller percentages for other race, Black or African American, Native American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Other race

Black or African American

Native American

Asian

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	670	88.62%
Two or more races	70	9.26%
Other race	11	1.46%
Black or African American	5	0.66%
Native American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%

Castlewood Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Castlewood's average per capita income is $47,500. Household income levels show a median of $87,768. The poverty rate stands at 3.04%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Families	$93,333	$95,303
Married Families	$92,188	-
Households	$87,768	$90,463
Non Families	$46,477	$75,838

$47,500

Average Income

$87,768

Median Household Income

3.04%

Poverty Rate